Every grammar has to a greater or lesser extent a functional aspect. In this book, Bondarko provides a comprehensive discourse on the theoretical foundations of grammar, concentrating on functional-semantic fields, with emphasis on the diversity of their structural types. Criteria for distinguishing between linguistically structured meaning and non-linguistic cognitive content is developed in a discussion on “the Category of Aspect and its Environment” which includes an analysis of aspectual opposition according to the Prague School. Special attention is also paid to analysing polycentric fields and, specifically, taxis in the Russian language. The book is divided into three sections: Functional Grammar: Subject Matter and Goals — Structural Types of Functional-Semantic Fields — Categorial Situations. This book is intended for those interested in the general theory of linguistics.